Launching multiple instances of the aggregator crashes

[chgeuer]

When launching a single instance of the aggregator, it grabs ownership of all partitions.

When launching a 2nd (and 3rd ..) instance of the aggregator, both the already running instance, as well as the new instance, indicate loss of partition ownership and completely cancel all work

info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
      Content root path: C:\github\microsoft\metered-billing-accelerator\src\Aggregator
info: Metering.Aggregator.AggregatorWorker[0]
      Worker running at: 03/04/2022 09:08:54 +01:00
info: Metering.Aggregator.AggregatorWorker[0]
      _12__5_789_ Saved state 2#10
info: Metering.Aggregator.AggregatorWorker[0]
      012345678910 Saved state 4#10

Here we see that after launch, it grabbed all 11 partitions. Now that we launch the 2nd instance, suddenly the 1st instance indicates OwnershipLost events, closes all partitions, and tells the innerCancellationToken is triggered from somewhere.

8: ProcessingStoppedReason.OwnershipLost
warn: Metering.Aggregator.AggregatorWorker[0] 
      Closing 1
      Closing 9
      Closing 8
      Closing 7
      Closing 5
      Closing 2
      Closing 0
      Closing 6
      Closing 3
      Closing 10
      Closing 4
      Closing everything
warn: Metering.Aggregator.AggregatorWorker[0]
      innerCancellationToken is Cancelled